Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 3: Gauges (IEC 34B/2034/CDV) (Amendment) (english version)
OVE EN 60061-3/A57: 2019 05 15
The cap shall enter the gauge until the pins have passed through the slots Q. The cap is then turned through a small angle and is pressed so that the pins are in close contact with the surface S. In this position the contact-making surface(s) shall not be below surface X, nor shall it project beyond surface Z. The drawing is intended only to illustrate the dimensions essential for interchangeability.